Jig saw



. j parts of my device,

are attained, as rherelnafter more f .atorth, pointed outjm -'myclaims,l

Patented Feb. 16, v1926. i I

UNITEDQSTA rre saw.

lamination nieuwe 18,1923. serial No; 646,075.

To all wlzomz't may concern.:

Be it known thatvI, Mosn EDWARD BAKER, a citizen of the UnitedStates,and a resident of Des Moines, in the county ofPolk State of Iowa, haveinvented a certain new and useful J ig Saw, of which the following is aspecification. f v

The purpose of my invention is to provide a simple and. inexpensive jigsaw structure. More particularly, it is my object to provide a jig saw,which is very light and y,is so constructed that it can be easily moved-from placemto place and can be readily mounted on a bench orothersupport when .ever desired. j Y,

One' of my purposes in constructing'my jig saw is to providesuch a sawso arranged that it can be fastened by means of clampsv on a'bench orthelike,gand is very compact, so that I avoidthe'necessity ofproviding-a three or four. legged stand to. support it. Still anotherobjectl is tol provide such a foot pedalandy spring v with the member'10 rfor rigidly holding the structure having a device foroperating thesaw, parts being so arranged that Vadjustment can beM'rea-dily Ymade forplacing the work table at any desired height. This feature vofconstruction is important because my jig saw is designed, among otherthings, for use in school andthe same jig saw can thus be convenientlyused bv children of different grades.

uIVith these and otheriobjects in view, my-

invention consists in theconstruction, arrangement andy combination ofthe kvarious `whereby the objects con- Vten'iplated Vfully set andillustrated in the accompanyingdraw-- ings, in which: Y

YFigure 1 shows aside elevationof a jig saw embodying my inventioninstalled on a work bench. i

Figure 2 shows av same. f Y v Figure 3 shows a vertical, detail,sectional view taken on 'the line 3-3 of Figure 1. i

Figure l showsr a perspective view of the frame of my device, partsbeing broken away. Y

Figure 5 shows a perspective view of a Ameans for securing differentsaws to the saw arms; and Figure 6 shows a lsectional view taken on theline (aL-6 of Figure 1.

front lelevation of the and Y device. kgy y A saw'18 Y One featureofmyimprovedjig saw vin the arrangement wherein a frame is provided'inwhich alll the parts are supported from .ae-single, horizontal member,which member is provided withl clamps, whereby it may be readily mountedon a work bench.

In the accompanying drawings,- I have vrused the reference numeral v10to indicate fra-s. PATENT; ortica;

generally, such horizontal; member,'which A may beV inl the form ofaboard arranged as shown inthe. drawings. Y

Securedfto-what maybe called the rear end'of'the horizontal member 10is. anl upright 11, which 'projectsabove and lbelow the member 10.' f

The frame of .the device, -I' preferably make` of wood and the membersareV preferably connected togetherv by bolts 12, so vthat' the frame can-bej readily taken apart or reassembled.f -Y y f f Supported on theupper edge of the horizontal member 10 latkits frnt portion'is a boardlforminga table. f; A bracket or brackets 14 may be connected table 13mplace. L l

Pivoted to he upright 11'below1ftlie-level ferent points vfor lusingsaws of@ diderent lengths forxcutting different ystock on ,the

v 'is'mountedin the front en dsf'o'f the saw arms 15 and 16 and extendsthrough a suitable hole 191 in the table Y The rearwardly vprojectingends of the saw arms are adjustably connected by some suitable means.

For illustrative"purposes, I haveshown the turn buckle structure 20. Agreat variety of means might accomplish shorter horizontal memberQl. f

i ofthe table 18 is a lower saw arm 15,which jthispurpose and be readilysubstituted for 'Y A brace element 22 is secured to the memy berforwardly with'relation to'v the vupright 11 andinclines upwardly to andis secured to the horizontal member 10 and also serves as a support forthe table 13, as shown in Figure 1. Y

Secured to the under side of the table 13 and to the brace member 22 isa bracket 23, which has adjacent to the brace member 22 a slot 24, whichreceives the lower saw ar-m` 15 so that the member 22 and the bracket 23form guides for the lower sav.7 arm.

Secured to the rear portion of the horizontal .member lO and incliningupwardly and forwardly therefrom is a spring. support`25,.Wh-ichoverhangs the-sau7 arms and has at its upper' part spaced angle ironbracket devicesA 26 to receive and support a coil spring 2T, whichspring is also secured tothe upper saw arm 16.

Different brackets 26 are provided for affordingpoints of attachmentlfor the spring at different heights,` so that the spring may beoperative whenl the saw arms are adjusted f'orusingl saws of differentlengths.

Secured to the horizontal frame member 10 are spaced clamp devices 28'Vand 29 for mounting the frame of my jig saw on a work bench .30 vor thelike.

It' Will be seenthat the frame heretofore described can be readily andeasily mounted on a bench.

lVhere benches of different heights are used in schools to accommodatechildren of different' grades' or of different sizes, it will be seenthat my sauf structure can be mounted on anyof such' benches.

Inl order to accomplish this purpose, l have provided a structure inWhich I have done-away'withthefuse of' supporting frames and legs.

.lt-'is myvpurpos'e' to operate the jig saw by foot power and havingthis purpose in mindi and desiring also to provide for the readymounting' ofY the frame on benches or desks of differentheights, it isnecessary to provide a foot pedal structure capable of being securednear any bench and of having f adjustable connection with the saw arms.

For this purpose5 I have provided a bracket Blyvhiclrcan be readily andeasily secured by bolts or screws 32 to a floor. Pivotedftothebracket 31is a foot pedal 33. A: rope 'ori other flexiblel device 34e connects thepivo-ted footpedal member33 Wit-h the lower satv arm 15. This flexibleelement cant ofcourse, be readily adjustable for operating .the jig sawat' diferent heights'.

It Will be' readilyv seen that my jig saw structure is'of very simpleand inexpensive construction and is particularly adapted for use inmanual training in schools'.

I have some of themf in use even in the kindergartens and can readilymount them on the kindergarten tables or on higher benches or tables.

The jig sanT device herein described is not only readily adaptable forchildren'of dif-- ferent sizes, but has a considerable range ofusefulness, because of its structural features to which attention hasalready been called.

lt will be noted tnat the arm 15 is preferably located closer to thetable 13 than the arm i6, so that the saw will be inoperative on 'the upstroke and the spring' will readily carry it upwardly.

ln order to make it easy to install san' blades of different lengths andthicknesses. l hare formed each saw arm with a slot 25 in its end wideenough to Ytake care of the thickest' saw blade that Will be employed.

Pivoted to theupper surface of the upper saw arm and lo the lowersurface of the louer sawarm is a plate 2G, which is pivoted between itsends by means of a pivot member extended through the hole 27.

ln the ends of the plates 26 are slots 2S and 29 adapted to receive sawblades of different thicknesses, and across the outer face of e ch plateare grooves 30 to receive a pin extended through the saw blade.

.lt will be seen that by 'loosening the turns` buckle 20 or other meansused for the purpose, the saw blade may be removed and another saw bladeinserted in its place, yafter the plates 26 have been turned around.

The sauT arms canibe adjusted on the upright 11 for sawing thickerstock, after a longer saw has been assembled on them, and the spring 2?'can be supported from the upper or lower brackets 26' as may be desired.

Some changes may be madeV in the construction and arrangement of thevarious parts of my improved jig saw Without departing` from the realspirit and purpose of my invention, and it is my intention to cover bymy claims, any modified forms of structure or use of mechanicalequivalents, which may be reasonably included Within their scope. l

I claim as my invention:

1. A portable saw comprising an up` right arm, a horizontal armprojecting therefrom, a table on said horizontal arm having av holetherethrough, a pair of saw supporting arms pivoted to said upright arm,a saw mounted between the ends of said saw supporting arms, adjustablemeans for connecting the opposite ends of the saw supporting arns, aninclined arm extending upwardly from said horizontal arm, a coil springconnected With the upper saw' supporting arm andv with said inclinedarm, a bracket, a foot pedal'pivoted to said bracket and a flexiblemember connecting'- the foot pedal and the lower saiv supporting arm, asecond horizontal arm spaced from the first, a guide for the lower sawarm supported on said horizontal arms. i' 1 o fl CII

llO

n. i portable saw comprising an uphaving ahole therethrough, a pair ofsaw and a flexible member connecting the foot supporting arms pivoted tosaid upright pedaland thevlower saw supporting arm, a arm, a saw mountedbetween the ends of second horizontal arm spaced from the rst, said sawsupporting arms, adjustable means a guide for the lower saw supf'ioltingarm, for connecting the opposite ends of the saw a second horizontal armspaced vfrom the 15 supporting arms, an inclined arm extendingI first, aguide for the lower saw arm sup-A upwardly rom said horizontalV arm, acoil ported on said horizontal arms, and serv-v spring connected withthe upper saw suping also as a support for said table. porting` arm andwith said inclined arm, a Des Moines, Iowa, April 6, 1923;' Y 10bracket, a footpedal pivoted to said bracket MUSE EDVARD BAKER.

